1000021111111 has 8 divisors (see below), whose sum is σ = 1090986829200. Its totient is φ = 909064511040.

The previous prime is 1000021111109. The next prime is 1000021111147. The reversal of 1000021111111 is 1111111200001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000021111111 - 2¹ = 1000021111109 is a prime.

It is a Duffinian number.

1000021111111 is a modest number, since divided by 1111111 gives 100002 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021411111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2049166 + ... + 2489803.

It is an arithmetic number, because the mean of its divisors is an integer number (136373353650).

Almost surely, 2^{1000021111111} is an apocalyptic number.

1000021111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000021111111 is a deficient number, since it is larger than the sum of its proper divisors (90965718089).

1000021111111 is a wasteful number, since it uses less digits than its factorization.

1000021111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559009.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1000021111111 its reverse (1111111200001), we get a palindrome (2111132311112).

The spelling of 1000021111111 in words is "one trillion, twenty-one million, one hundred eleven thousand, one hundred eleven".